title: Quantum inductance and high frequency oscillators in graphene nanoribbons.
abstract: Here we investigate high frequency AC transport through narrow graphene nanoribbons with top-gate potentials that form a localized quantum dot. We show that as a consequence of the finite dwell time of an electron inside the quantum dot (QD), the QD behaves like a classical inductor at sufficiently high frequencies ω ≥ GHz. When the geometric capacitance of the top-gate and the quantum capacitance of the nanoribbon are accounted for, the admittance of the device behaves like a classical serial RLC circuit with resonant frequencies ω ∼ 100-900 GHz and Q-factors greater than 10(6). These results indicate that graphene nanoribbons can serve as all-electronic ultra-high frequency oscillators and filters, thereby extending the reach of high frequency electronics into new domains.
authors.affiliation: Department of Physics and Engineering Physics, Stevens Institute of Technology, Hoboken NJ, USA.
authors.forename: Milan
authors.initials: M
authors.lastname: Begliarbekov
authors.forename: Stefan
authors.initials: S
authors.lastname: Strauf
authors.forename: Christopher P
authors.initials: CP
authors.lastname: Search
mesh_terms: D017097:Electric Impedance; D006108:Graphite / Q000737:chemistry*; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D009991:Oscillometry / Q000379:methods*; D045663:Quantum Dots
chemical_list: D006108:Graphite